Eurycorypha resonans, Hemp, 2013

Heller, Klaus-Gerhard & Hemp, Claudia, 2020, Hyperdiverse songs, duetting, and the roles of intra- and intersexual selection in the acoustic communication of the genus Eurycorypha (Orthoptera: Tettigonioidea, Phaneropterinae), Organisms Diversity & Evolution (New York, N. Y.) 20 (4), pp. 597-617 : 611

Eurycorypha resonans ( Figs. 3 , 4b , and 5 )

The calling song of E. resonans was described by Hemp et al. (2013). It contains two different types of echemes, one with two syllables and another one with many syllables. Disyllabic echemes were heard only sporadically and mostly between series of polysyllabic echemes. They were typically produced at relatively large intervals (1–2 min). Both of its syllables were similar in structure (duration of first syllable, 12.2 ± 1.2 ms; of second, 15.4 ± 14 ms; syllable period, 53.7 ± 1.3 s; SRR, 18.5 Hz; n = 10; T = 20 °C) and consisted of several isolated pulses (for details, see Hemp et al. 2013). Polysyllabic echemes ( Fig. 5 ) were registered from all individuals. They contained 9–21 syllables, with syllable periods of 37.5 ± 7.6 ms (SRR, 27 Hz; n = 4 males with 10 measurements each; range, 26–54 ms). Each syllable consisted of one pulse. Intervals between the polysyllabic echemes varied from 5 to 15 s. These echemes were typically produced in series of quite a variable duration, ranging from 15 s up to 5 min.

Figures

Fig. 3 Power spectra of male calling song of Eurycorypha species. In species with restricted frequency range, short black lines mark its end. Blue lines indicate power spectra of female responses

Fig. 4 a, b Oscillograms of male calling songs, overview (10 s sections)

Fig. 5 Oscillograms of male calling songs, details (1.5 s sections)